From MIT, a sketch interface that results in models of simple mechanical systems. Reminiscent of Crayon Physics at kloonigames.com/crayon/ and Chalk at http://www.konjak.org/chalk.htm.
Jon Plummer is an interaction designer based in Los Angeles. On this site he writes about interface and information design, business, and experiences. He’s also interested in industrial design, architecture, playing jazz piano, home repair, and making fun things out of discarded tech.